What is the structural relationship between the eye and the camera, and between the eye and the came

The role of the human eye is more akin to a video camera than a static camera. The human eye turns repeatedly, continuously receiving light signals from the outside world and "updating" the details of the images in the brain at any time. At the same time, the brain can also increase the resolution of the image by combining the different signals received by the eyes.

Moreover, we often roll our eyes or turn our necks to receive more information. Therefore, the organic combination of the eyeball and the brain makes the resolution of the human eye not only determined by the light receptors on the iris.

Based on the above points, suppose there is a square view ahead, such as an open window. The pixel value is equivalent to [90 (degrees) 60 (radians degrees)1, which is 324 million pixels. But you don't realize that there are so many pixel values, it's just that the brain gets the "useful" details according to the need.

On the other hand, the human eye has a very wide range of vision, almost 180 degrees. If we calculate in this way, even if we calculate only 120 degrees, we can reach 576 million pixels. With such a high pixel value, it is true that it cannot be compared with existing digital cameras.

Because the retina can be imaged, that is, the inverted image is equivalent to film, the pupil surrounded by the iris can adjust the amount of light intake equivalent to the aperture, the lens and cornea, especially the lens, are elastic and retractable as a lens, the choroid in the wall of the eye (with melanocytes that can absorb excess light) is equivalent to a dark box, and the eyelid is the eyelid that opens and closes rapidly to be equivalent to a shutter. So the human eye is a magical autofocus camera. As for pixels. ##

The structure of the human eye is similar to that of a camera, the cornea of the human eye is similar to the lens of a camera, the lens is similar to a focusing device, the pupil is similar to an aperture, and the pigment film is similar to a cassette.

When the refractive refraction is corrected remotely, distant objects will be imaged above the retina, but objects at close range will not be clearly imaged on the retina; Therefore, in order to clearly image objects at close range on the retina, the refractive power of the eye must increase, and this physiological function of the eye is what we call the regulatory function.

The function of the human eye to concentrate light rays at different distances on the retina at different times is to adjust. From the perspective of static refraction, ocular accommodation refers to the ability to image the retina when fixing on a near target.

Our eyes are like cameras, so what is the structure and function of our eyes?

The pupil of the eyeball is equivalent to the aperture of the camera.

The lens of the eyeball is equivalent to the lens of a camera.

The ciliary body of the eyeball acts as the camera's focusing system.

The retina of the eyeball is equivalent to the negative of the camera.

The eyeball wall of the eyeball is equivalent to the camera obscura.

The vitreous of the eyeball is, of course, the camera obscura

They are all convex lens principles, and the object distance is greater than the focal length

Advantages of camera: The camera can capture the momentary action that the human eye cannot perceive, such as a lot of sports photography, and the wonderful moment when people are flying and jumping cannot be detected by the human eye; The camera itself is also a telescope and a microscope, whether it is telephoto photography or macro photography, it can take images that cannot be seen by the human eye; The ** of Kirigami captured by the camera is not only a reproduction of art, but also a record of history, no matter how strong people's memory is, it is impossible to remember the situation when they were just destroyed. Advantages of the human eye:

The dynamic range of color on the human eye is many orders of magnitude higher than that of a camera.

The two work on a similar basis:

The lens is equivalent to the lens of the camera, figuratively speaking, they all play the role of a convex mirror, the external scenery passes through them to make the original upright image become an inverted image projected on the retina and CCD, the retina and CCD have a similar role, are to convert the light signal into electrical signals (human bioelectricity, very weak), electrical signals through the wire (human is the optic nerve, are responsible for transmitting electrical signals), the camera's processing chip can be processed to present the image to the display, and the human brain analyzes, See what you see.

Traditional cameras are similar, the negative is equivalent to the CCD, and the light signal is also expressed in a certain form, the difference is that the negative can only be seen after the processing of the negative**, so the working principle of digital cameras and eyes is more similar.

Compared with the eyeball, there is not much difference between the eyeball and the camera.

Pupil: Just like the aperture of a camera.

The cornea, aqueous humor, lens, vitreous humor: just like the lens of a camera.

Retina and macular area (fovea): Like a camera's film.

Ciliary muscles (ciliary body): Adjust the focal length like a camera.

Both use the principle of aperture imaging, with the eye imaged on the retina and the camera imaged on the negative.